Tire-tread.



A. P. NIRDLINGER.

TIRE TREAD.

APPUCATION FILED 1AN.3|.1914.

Paented Mar. 2l, 1916.

ffii).

l@ eimproyed ALBERT NRDLINGER, 0F CHCiA-l, ILLINGIS.

TIRETRED.

Speeileaton ci etters Patent.

Patented `liar. 191' .application ed January Si, 5.5M. Serial No. $5,591.

'at Chicago. in the county of @ook and State of illinois, have invented certain new and useful .improvements in Tire-mreads, of which the following a specification.

My invention relates to tire treads and has for its primary object the provision o' an tire tread which shall means for increasing the Wearing properties thereof.

Vfith the above 1and other objects in View, this invention consists substantially in the combination, arrangement and 'construction of parte Vall as hereinafter described, shown in the' accompanying drawings which form a part et this specitication and illustrate the preferred embodiment of my invention, and

ggd more particularl set forth in the subjoined claire.

In the drawings-Figure i is a transverse section oi' a tire constructed in accordance with the principles of this invention and 'taken on the line l-l of Fig. 2; 2 is a section taken on the line 2-2 of Fig. l; Fig. 3 is a perspective detail View efe` portion of improved tread allie. l is an elevation similar to Fig. 3, but illustrating a Worn condition of the hearing face or" the tread; Fig. 5 is a magnified section taken on line 5 5 of Fig. Figs. 6 and i" illustrate Various metnods of constructing tires in accordance with the principle of this invention.

Reference numeral l0 indicates generally my improved tire tread, which ismade up or" closely associated threads il, each thread being 'preferably composed or a plurality of strands 12 (see Fig. 5). The threads ll are placed approximately parallel longitudinally in the Construction of the tread and are closely associated together by any convenient adhesive. the: preferable medium being rubber. iin that embodiment of the invention found'to be at present most practicable. the threads 1l are 'of a length co-extensive with the desired thickness oi' tread. The preferable construction of each or" the threads li is that of a thread composed of approximately one hundred line strands of cotton, though any other strand of threadforming material may be employed if desired, 'the preferable material, however. be-

ing some vegetable liber. The thread l1 aiter being `.Formed of the strands l2 is lboth Saturated and coated with a solution of rubhave thread be twisted in its cons ,ruetioa ber7 the saturation and coating being ind1- cated in Fig. 5 by reference numeral 13.

lVith ythe thread ll preferably so construcb ed, the tread l0 is made therefrom by vul.- canizing-together in closey relation and an proximately parallel 'to cach other desired lengths of thread. in this construction, as is illustrated at one en/l of 4.-. the fibers of the cotton or other thread forming strands lie in the general. direction of the length of the thread'll, even though the i lt has been found practicable 1ny constructing the tread l0 to employ a plurality4 of saturated threads and toy form the thread lengths il by doubling the saturated thread upon itself, as is clearly-illustrated in the drawings. In the adaptation of the tre-a 'l 10 to a tire, the essence of this inventionlies .incausing the various thread lengths ll to present their ends to the road surface, and this associa.- tion of the tread with respectto the tire may lie-seen in Figs. l, 2, (i. and L?. ll/Thile it is true that when the tire lirs; 'formed in the folded manner indicated in the drawings it will present a curved portion of thread to the pavement by means of the bends in the thread indicated at le., in Figs.

and 3, this bend le will rapidly `.year away upon the parement, leaving a, frayed end 15 upon each thread il for the'reason that the rubber or other adhesive medium employed to saturate the Vthread l and to cause the Various threadsl to adhere together Will wear away Vmore rapidly than the 'threadorming material of the strands After the tire has been used for a short time7 the bends ll of the exposed surface of the tread -will become Worn away7 .leaving the upper edge of' the tread as shown in Fie. By reason of the presentation of the endssoi the threads ll and their strands l2 to the pavement, as the tire rubs there-against, the Wearing away of the tread 10 is greatly retarded andthe lite of the tread consequently lengthenedj for the reason that the strands present greater resistance to wear when fric tion is airblied acrossy their ends than when itis applied longitudinally or the strand.

.ln Figs. l4 and 2 1s illustrated a Weibv known form of pneumatic tire i? furnished with the tread l0 in the preferredforni.. the

tread being constructed or" greater thickness along the median line oi' the tire preferably, and tapering toward the sides oi the tire. .if tonnel desirable, a sinn coat lo may be P91 los of tread material l0, and in Figi/is depicted- "a tire, the body of which is constructedy of any 'desired resilient material 18 faced with mynnproved tread 10, it is found practicable in constructing the tread 10 to let the folds of lsaturated thread be bent into thread V- lengths 1l and to employ as many separate saturated threads as there are thread lengths il in the width of the tread, these saturated. threads -are each redoubled upon itself with eaehof the short straight portions between the redoubled portions disposed radially from a central point of a transverse section of the tire at such portion.

It is to be understood that in the construction of the threads 11, those threads after being saturated preferably in a solution of rubber are,associated together in as firm a combination as the adhesive material employed will permit of-if rubber is the me dium,l vulcanizing will accomplish the `desired close associ tion of the thread lengths l1. Y

i In the accompanying drawings and the foregoing description is illustrated the preferred embodiment of my invention, but it is obvious that one skilled in the art may make modifications thereof Without departing from the spirit of the invention.

I claim:

The combination with a pneumatic tire for vehicles, of a tire tread made up 'of a plurality of threads disposed side by side longitudinally around the tire, each thread being doubled back upon itself with short straight portions between the bends thereof, said short straight portions being secured/ t0 the tread and to each other by vulcaniz/ed rubber and extending radially from a cen'- tral point of a vtmns'v'seise section of the tire at such portion.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 31st day of March, A. D. 1914.

ALBERT P. NIRDLINGER.

Witnesses H. G. ROCKWELL, ALLENA OEFUTT. 

